shell escape empty arg
shell escape empty arg

git-svn-id: 357248c53bdac2d7b36f7ee045286eb205fcf757@41 ec762483-ff6d-05da-a07a-a48fb63a330f

redpony/cdec,veer66/cdec,m5w/atools,m5w/atools,redpony/cdec,pks/cdec-dtrain,redpony/cdec,pks/cdec-dtrain,carhaas/cdec-semparse,redpony/cdec,carhaas/cdec-semparse,m5w/atools,redpony/cdec,veer66/cdec,pks/cdec-dtrain,veer66/cdec,pks/cdec-dtrain,pks/cdec-dtrain,pks/cdec-dtrain,veer66/cdec,redpony/cdec,carhaas/cdec-semparse,carhaas/cdec-semparse,veer66/cdec,veer66/cdec,carhaas/cdec-semparse,carhaas/cdec-semparse